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Changing cluster size of NTFS on Windows 7 without formatting

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Greetings,

Is it possible, using Disk Director, to change the cluster size of NTFS on Windows 7 without formatting the drive?
I'm using an SSD as the OS drive on a Windows 7 Professional Service Pack 1 64-bit.
It is currently set to 4KB. I'd like to set it to something smaller, probably 512B.
My reasoning is built on the following file size distribution on the SSD: (file size : number of files)

0 - 512B: 51,072 files
513 - 1024: 39,769
1k - 2k: 52,081
2k - 4k: 67,159
4k - 8k: 60,221
8k - 16k: 50,319
16k - 32k: 39,072
32k - 64k: 30,821
64k - oo: 85,055

I have moved as much as possible of any application's temp space need to other HDDs.

Your advice is much appreciated.

Thanks.

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